Cap for tire-valves



M C. SCHWEINERT. CAP FGF? TIRE VALVES, APPUCAHGN mm 1AM. 26 I915. RENEWED IAN. 20.1920.

INVENTOR WlTNESSESI z 3 Attomyy, kit r/ 405K711 7 J Patented Oct. 19, 1920.

UNITED STATES PATENT OFFICE.

MAXIMILIAN CHARLES SCHWEINERT, OF WEST HOBOKII I', 1mm.

' CA1 FOR TIRE-VALVES.

Specification of Letters Patent.

Application filed January 26, 1916, Serial no. 74,333. Renewed January 90, 1820. lath] Io. Slllfllii To all w/umt it may concern:

lie it known that I Maximilian (nannies Scnwemmrr, a citizen of the U nite lStates of America, residing in West Hobokcn, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Caps for Tire-Valves; of which the following is a specification.

This invention relates to capsparticularly adapted for pneumatic tire valves. in the standard pneumatic tire valve a casing is provided which passes through the rim of the wheel, and the outer end of this casing is formed ,with a reduced portion or nipple which is screwthreeded on the exterior to receive a cap, by means of which the valve casinjp, is closed to prevent leakage from the interior should any air pass through the valve insi des or-(sheck portion. Such cops have heretofore been provided with e p ae ing which contacts with the iextremc bitter end of the nipple, the packing being compressed against the end by the screwing on of the cap. Accozdin to the present invention a cap is provi ed which carries the packing designed to contact with the shoulder formed between the body of the easing and the nip 1e. By this means the entire thread 0ft e nipple is protected and the outer. emltherepf is lct'tfrec and uvaihv able for other-purposessueh us contact with a. packing carried by the valve insides or the like.

Referring to the drawings which illustrate several forms: of the invention.-

Figure l is a sectional view of a cap;

r-onstmcted according to the 'ircsent invcption s s-applied to nastandard valve;

ig. 2 is an elevation of a rap.

Fig. 3 is a section of the. cap dcl'su'l imlh Fig. 4 is a top view:

Fig. 5 is an under side view. Fig. 6 is an elevation of a cap having the usual screw-driver projection For manipulating the standard valve insides. 1

Referring to the drawings let A indicate a tire valve casing having at its upper part a nipple ll of reduced diameter so that llioro is l'ormcd between the two a shoulder l. The casing A may carry the usual valve insides l) or any'other suitable insides or check mechanism l] indi ates the up which. :u-cordinn to the resent invention. is considerably longer than those heretofore connnonly employed. the cap being provided on its interior with Patented Oct. f9, 1920.

threads F designed to engage the exterior threads of the nipple. Near the bottom of the cap it is preferably formed with an enhugged portion G whic constitutes in effect a ange preferably of all htl less diameter than that of the casing lvithin the 61F lerged rtlon G is a packing H which is designe to contact with the shoulde'r O and form a prevent any possible leakage throu h the valve casing. Preferably the cap is Formed with an internal tapered portion '1 and a groove or recess J, and the packing H is referably constructed with an exterior conguratitm, which will fit these parts. Preferably also the packing is snflicientl enlerged at its lower end providing a ange K which extends slightly below the metal of the cap.

The construction thus described provides a packing which is capable of making a tight joint with the valve casing and holding its place within the l cap.

0 assist in the latter I prefer'to apply the packing in a partly vulcanized state and then mold it by a second vulcanizing process directly in place.

An important feature of the invention is the provision of a cap of suflicient length so that above the end of the nipple there is provided a chamber M which IS sufficiently large to inclosei the projecting end 0 of the valve insides or any other projecting parts of the latter such as manipulating flanges or the like, and such chamber is prefrably made of the full internal diameter of the cap although this maybe varied from in special instances.

in Fig. 6 I have shown the cap as provided with the usual Screw-drivtr projection l which is formed at the top of the chamber M. in either construction the. body of the cup will be indicated at Q, is profi crahly of the same external diameter throughout, and is provided with a knurled or ribbed face. This affords a long grasping portion by which the cup may he Inanipulated in contrarlistinction to the axially short band with which the usual cup is provided. The cap is hence easy to turn, and considerable force may be exercised by the use of the fingers in tightening it in place.

lly the present invention the entire screwthreaded portion of the nipple is protected so that it is not liable to he fouled with dirt or subject to accident while at the same time tight joint therewith whereby to the upper end of the nipple is left available for other purposes such as those described. Furthermore, to a very considerable extent the present valve on performs the function of a dust cap since t ie nipple threads are all protected by the cap. Nevertheless it is desirable that the external diameter of the rap shall not exceed that of the valve since this construction ermits a dust rap to he used if desired. urthermore, it is preferable that a valve with the cup in place shall be capable of being passed through the ordinary hole in the tire rim which would be impossible if the cap exceeded the diameter of the ,casing to any substantial extent.

While I have shown and described several forms of the invention, it will be understood that I do not wish to be limited thereto since various changes ma he made therein without departing from the invention.

What I claim 1s:-

1. The combination with a valve casing having a nipple of reduced diameter and a shoulder between the body of the casing and said nipple, of :1 ca ada ted to screw on said nipple, and to inc ose tie some tlnonghout its ength, the external diameter of said rap being no greater than the external diameter of said (using and said rap haviu a parking fixed to its lower end and ying oxteriorly of the external diameter of said nipple, and interiorlylof the external diameter of said casing, w ereby the rap when in position does not interfere with the npplirntion of a dust cap or the like to said rasing.

2. The combination with a valve (using having a nipple of reduced diamolor and a shoulder between the hodly of the casing and said nipple, of a cup in opted to svrcw on said nipple and to inclose the same throughout its length, the (external diameter of said cap hein no greater than the external diameter 0 said oasiug, and said cap having a )ucking vulranizcd to its lowor end, and lying exteriorly oi the external diameter of said nipple and interiorly of the external diameter of said casing, whereby the rap assume Y; Y 0 ddes not interfere with the when in position like to said application of a dust cap or the casing.

:1. he combination with a valve casing havin a nipple of reduced diumter and a Sll0lll or between the body of the casing and said nipple, of a rap {ll opted to screw on said nipple and to inclose the same through out its length, the external diameter of said rap being no greater than the external diameter of said casing, and said rap having a recess at its lower end, and a packing fixed in said recess, and lyin exteriorly of the external diameter of sniil nipple and interiorly of the external diameter of said casing. whereby the rap when in position does not interfere with the uppli'iw tion of a dust (up or the like to said casing. 4. The combination with a valve casing havin a nipple of rmluord (lint-vi?! and a shoulr or ln-tweon the body of the f f an said nipplr, of a rap adapb aarew on said nipple and to mrlo on; throughoxtoruu; diameter of sun out its length, the

than the external dirap being no groan-r ametor of said casing, and said rap having an onhirgvnn'nt at its lower end, a recess in said enlargement, and a parking fixed in said recess, and lying extoriorly of the extornnl diameter of said nipple and interiorly of the external diameter of said casing, u'heroby the (a I when in position does not interfere with t c application of a dust ("up or the like to said casing.

5. valve cap having an enlarged por lion at its lower end, an internal tone, and urow-s8, and a parking contacting with said taro and entering said recess, and said packing having a portion extcndinglwlow said enlarged portion of the on In witness whereof. have hereunto signed my name in the presenre ol' iwo subsi-rihinp; witnesses.

lllAXlMllilAN CHARLES SflllWlilliEltT.

Witnesses:

(Hm-i. lnron Rnssnui, THOMAS I. WALLACE. 

